package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.impl.client.HttpClients;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {


    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    public static final  String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    /*
    * 微信登录*/
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO){

        String openid=getOpenid(userLoginDTO.getCode());
        //判断openid是否为空,为空就登录失败,抛出异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);

        }

        //判断是否为新用户.自动完成注册
        User user = userMapper.getByOpenId(openid);
        if(user==null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);

        }

        //返回这个用户对象

        return user;
    }


    /*
    * 调用微信接口,获得openid
    * */
    private String getOpenid(String code){

        //调用微信接口,获得openid
        Map<String,String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);

        String openid = jsonObject.getString("openid");
        return openid;

    }
}
